/Engine/Source/Runtime/Engine/Classes/Engine/World.h
Sent when aULevelis removed from the world viaUWorld::RemoveFromWorldor LoadMap (a NULL object means the LoadMap case, because all levels will be removed from the world without a RemoveFromWorld call for each)
static [FOnLevelChanged](API\Runtime\Engine\Engine\FWorldDelegates\FOnLevelChanged) LevelRemovedFromWorld;